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This is the most value I've found and I've researched thoroughly. Synthetic is heavier than down, however this weighs in under 4 pounds. All bags absorb moisture and sweat, however synthetic bags dry fast and will be ready night after night, whereas down bags can take 3-4 days to completely dry out....
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Your search for "" returned reviews for Marmot-20-F-Sorcerer-Sleeping-Bag-Long-Mummy

Great Value

Reviewed by GearMom from Minneapolis on Thursday, March 22, 2018

My son is 6'6" and this bag fits him nicely. It was light enough for backpacking in CO and washes up nicely in the wash machine. The stuff sack that comes with it is generous in size so that you don't have to wrestle to get the bag into it. The only reason I didn't give a 5 star is it has not been tested down to 20 degrees.

Verified Buyer
Reviewed by Mom of Boys from Virginia on Friday, December 30, 2016

Another good Marmot product. Love the extra length and the bag is lighter Thani imagined!!! Highly recommend.
Had a great experience wilt Sierra Trading Co. package arrived very quickly, and with a return label included for easy returns. Will definitely be using them again!!

Verified Buyer
Reviewed by Natalia from Utah on Thursday, August 25, 2016

This is a great sleeping bag! I've only used it once to camp in Teton National Park in August. It didn't get too cold, so I was comfortable in the bag. The long is very long so there's a lot of space (I'm 5'5''). It seems like great quality and it stuffs to a decent size that could work for backpacking. I haven't found anything wrong with it so far.

Verified Buyer
Reviewed by DJ REWIND from California on Wednesday, August 3, 2016

You can't go wrong with marmot! This sleeping bag is really comfortable and warm! The qaulity is superb and it fits easily in the stuff sack it comes with, perfect for stowing on hikes and camping trips

Verified Buyer
Reviewed by Josepi from Pennsylvania on Friday, June 3, 2016

This bag is HOT. First trip with it, the evenings were in the mid to high 60's and so humid you could nearly swim through the air. This bag made an awesome sleep pad! Would have drowned in sweat if I stayed in longer than the 5 I did. May re-review once I get some colder weather.

“How will this bag fit into an Osprey Atmos backpack's sleeping bag compartment? I'm purchasing for backpacking but I'm concerned that this may be too bulky to fit into the sleeping bag area of my pack. I'm not very concerned about weight, just actual volume.

Lastly, if it is a bit large will compression/stuff sacks from other manufacturers make this thing small enough to be reasonable?

We do not carry the Osprey Atmos backpack, so I can't give you an accurate answer on that. However, the stuff size is listed at 16x9". You may be able to get a compression sack for this item, but I can't guarantee how small it could get down to.

About Marmot

Conceived in a university dorm room by a pair of climbing buddies, Marmot Mountain Works first opened its doors in the spring of 1974 in Grand Junction, Colorado. At the time, the base of operations was a 100-year-old stone building. That same year, the first Marmot down jacket was produced specifically for an action flick called “The Eiger Sanction,” starring legendary actor Clint Eastwood. In the four decades since, Marmot has continued to engineer reliable gear that exceeds the expectations of outdoor athletes. Today, Marmot tents, backpacks, outerwear, clothing and Marmot sleeping bags are still pushing the limits in the planet’s most challenging conditions, from the summits of the world’s highest mountains to the deepest river basins.